Support BGRA8888/ABGR8888 format

## Format Details
- **Type:** BGR with alpha (reversed RGBA)
- **Description:** 32-bit BGRA/ABGR with alpha channel
- **Color Depth:** 8 bits per channel including alpha in BGR order

## Implementation Requirements
- Parse BGRA8888/ABGR8888 data from camera stream
- Handle alpha channel properly
- Support both byte orders (BGRA vs ABGR)

## Parent Issue
Part of #1